package com.sky.service.impl;


import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.context.BaseContext;
import com.sky.dto.CategoryDTO;
import com.sky.dto.CategoryPageQueryDTO;
import com.sky.entity.Category;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.CategoryMapper;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.CategoryService;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.time.LocalDateTime;
import java.util.List;

@Service
public class CategoryServiceImpl implements CategoryService {
    @Autowired
    private CategoryMapper categoryMapper;
    @Autowired
    private DishMapper dishMapper;
    @Autowired
    private SetmealMapper setmealMapper;

    /**新增分类
     *
     * @param categoryDTO
     * @return
     */
    @Override
    public void add(CategoryDTO categoryDTO) {
        Category category = new Category();
        //先拷贝
        BeanUtils.copyProperties(categoryDTO,category);
        //设置默认状态，默认为1禁用
        category.setStatus(StatusConstant.DISABLE);
        //设置创建时间和更新时间
        category.setCreateTime(LocalDateTime.now());
        category.setUpdateTime(LocalDateTime.now());
        //设置创建人和更新人
        category.setCreateUser(BaseContext.getCurrentId());
        category.setUpdateUser(BaseContext.getCurrentId());
        categoryMapper.add(category);
    }


    /**分类分页查询
     *
     * @param categoryPageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(CategoryPageQueryDTO categoryPageQueryDTO) {
        PageHelper.startPage(categoryPageQueryDTO.getPage(),categoryPageQueryDTO.getPageSize());
        Page<Category> page = categoryMapper.pageQuery(categoryPageQueryDTO);
        Long total = page.getTotal();
        List<Category> records = page.getResult();
        return new PageResult(total,records);
    }


    /**根据id删除分类
     *
     * @param id
     */
    @Override
    public void deleteById(Long id) {
        //查询当前分类是否关联了菜品，如果关联了就抛出业务异常
        Integer count = dishMapper.countByCategoryId(id);
        if(count > 0){
            //当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_DISH);
        }

        //查询当前分类是否关联了套餐，如果关联了就抛出业务异常
        count = setmealMapper.countByCategoryId(id);
        if(count > 0){
            //当前分类下有菜品，不能删除
            throw new DeletionNotAllowedException(MessageConstant.CATEGORY_BE_RELATED_BY_SETMEAL);
        }
        categoryMapper.deleteById(id);
    }

    /**修改分类
     *
     * @param categoryDTO
     */
    @Override
    public void updateById(CategoryDTO categoryDTO) {
        Category category = new Category();
        BeanUtils.copyProperties(categoryDTO,category);
        category.setUpdateTime(LocalDateTime.now());
        category.setUpdateUser(BaseContext.getCurrentId());
        categoryMapper.updateById(category);
    }

    /**启用|禁用分类
     *
     * @param id
     * @param status
     */

 @Override
    public void startOrStop(Long id, Integer status) {
        Category category = new Category();
        category.setId(id);
        category.setStatus(status);
        categoryMapper.updateById(category);
    }

    /**根据类型查询
     *
     * @param type
     * @return
     */
    @Override
    public List<Category> selectByTypr(Integer type) {
        return categoryMapper.selectByType(type);
    }
}
